Wavelength and frequency are really important when we talk about how light waves work, especially in the electromagnetic spectrum.

Let’s break it down:

• Wavelength ($\lambda$) is the space between two high points (or peaks) of a wave.
• Frequency ($f$) tells us how many peaks pass by a certain point in one second. We measure this in hertz (Hz).

Wavelength and frequency are connected in a special way:

$c = \lambda f$

Here, $c$ is the speed of light, which is about $3 \times 10^8 \, m/s$ (that’s really fast!).

For example, visible light, which is the light we can see, has wavelengths between about 400 and 700 nanometers (nm).

• Shorter wavelengths, like blue light, have higher frequencies. This means they carry more energy.
• Longer wavelengths, like red light, have lower frequencies, so they carry less energy.

This connection helps us understand things like the color spectrum and how different energies of light (called photons) behave!